Tengerite-(Y) Mineral Data

Tengerite-(Y) Mineral Data +

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General Tengerite-(Y) Information

Chemical Formula:

Y2(CO3)3·2-3(H2O)

Composition:

Molecular Weight = 402.88 gm

Yttrium 44.14 % Y 56.05 % Y₂O₃

Hydrogen 1.25 % H 11.18 % H₂O

Carbon 8.94 % C 32.77 % CO₂

Oxygen 45.67 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Y₂(CO₃)₃·2.5(H₂O)

Environment:

Alteration product of gadolinite.

IMA Status:

Valid Species (Pre-IMA) 1838

Locality:

Ytterby, northeast of Stockholm, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for C. Tenger, Swedish geologist.

Synonym:

ICSD 72940

PDF 47-1828

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Tengerite-(Y) Crystallography

Axial Ratios:

a:b:c =0.6637:1:1.6505

Cell Dimensions:

a = 6.078, b = 9.157, c = 15.114, Z = 4; V = 841.19 Den(Calc)= 3.18

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Pb21m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 4.58(1), 3.89(0.9), 7.53(0.9),

Crystal Structure:

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Miyawaki R , Kuriyama J , Nakai I , American Mineralogist , 78 (1993) p.425-432, The redefinition of tengerite-(Y), Y2(CO3)3.2-3H2O, and its crystal structure

Physical Properties of Tengerite-(Y)

Color:

White.

Density:

3.12

Diaphaniety:

Transparent to translucent

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Pulverulent - Forms a loose, poorly-coherent powdery mass.

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Tengerite-(Y)

Gladstone-Dale:

CI meas= 0.064 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.082 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1858,KPDmeas= 0.1894,KC= 0.2024

Optical Data:

Biaxial (+), a=1.587, b=1.57, g=1.616, bire=0.0290

Calculated Properties of Tengerite-(Y)

Electron Density:

r_electron=2.99 gm/cc
note: r_{Tengerite-(Y)}=3.12 gm/cc.

Fermion Index

Fermion Index = 0.0012
Boson Index = 0.9988

Photoelectric:

PE_{Tengerite-(Y)}= 54.22 barns/electron
U=PE_{Tengerite-(Y)} x r_electron= 162.07 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tengerite-(Y) is Not Radioactive

Tengerite-(Y) Classification

Dana Class:

15.4.3.1 (15)Hydrated Carbonates

(15.4)Dana Type

(15.4.3)Dana Group

15.4.3.1 Tengerite-(Y) Y2(CO3)3·2-3(H2O) Pb21m mm2

Strunz Class:

V/D.03-45 V - Nitrates, Carbonates and Borates

V/D - Water-bearing carbonates without unfamiliar anions

V/D.03 - Calkinsite-(Ce) - Lokkaite-(Y) series

V/D.03-02 Adamsite-(Y)! NaY(CO3)2·6(H2O) P1 1

V/D.03-05 Shomiokite-(Y) Na3Y(CO3)3·3(H2O) Pbn21 mm2

V/D.03-10 Calkinsite-(Ce) (Ce,La)2(CO3)3·4(H2O) P 2₁221 2 2 2

V/D.03-20 Lanthanite-(La) (La,Ce)2(CO3)3·8(H2O) Pbnb 2/m 2/m 2/m

V/D.03-30 Lanthanite-(Ce) (Ce,La)2(CO3)3·8(H2O) Pbnb 2/m 2/m 2/m

V/D.03-40 Lanthanite-(Nd) (Nd,La)2(CO3)3·8(H2O) Pbnb 2/m 2/m 2/m

V/D.03-45 Tengerite-(Y) Y2(CO3)3·2-3(H2O) Pb21m mm2

V/D.03-50 Kimuraite-(Y) CaY2(CO3)4·6(H2O) Imm2,I mmm,I 222,I 2₁2₁2₁ Ortho

V/D.03-55 Galgenbergite-(Ce)! Ca(REE)2(CO3)4·(H2O) P1 1

V/D.03-60 Lokkaite-(Y) CaY4(CO3)7·9(H2O) Pb2m mm2

Other Tengerite-(Y) Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Tengerite-(Y) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST

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Tengerite-(Y)

Y2(CO3)3·2-3(H2O)
Dana No: 15.4.3.1 Strunz No: V/D.03-45
Locality:

Notes: